Joint for sheet metal roofing



May 23, 1939. x E DELK 2,159,136

JOINT FOR SHEET METAL ROOFING Filed Oct. 29,, 1937 3mm [Id/yard MDGZ 1%W Wa Patented May 23, 1939 UNITED STATES PATENT OFFICE eight-tenths toRoy E. Adams and one-tenth to James E. Parsons, both of Shelbyville,Tenn.

Application October 29, 1937, Serial No. 171,762

1 Claim.

This invention relates to an improved joint for sheet metal roofingstrips and has for its object to provide a joint which is water-tightand requires only a small amount of material for its formation.

A further object resides in providing a joint which will simplify thejoining of the roofing strips so the roofing may be laid in a minimumamount of time.

Another object of the invention resides in providing a joint which isstrong and durable in construction, efiicient in use and inexpensive tomanufacture.

Other objects and advantages of the invention Will be apparent duringthe course of the following description.

In the accompanying drawing, forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. l is a fragmentary perspective view of a sheet metal roofconstructed according to my invention.

Fig. 2 is a sectional view of the roofing shown in Fig. 1, showing thejoint between the sections of roofing.

Fig. 3 is a perspective view of one section of roofing, and,

Fig. 4 is a perspective view of the clamp for the joint between thesections of roofing.

In the drawing, wherein for the purpose of illustration, I have shown apreferred embodiment of my invention, the numeral 5 denotes a section ofsheet metal roofing bent to form a 33 series of parallel spacedlongitudinal ridges 6 extending the length thereof. The ridges aresubstantially U-shape in cross section with their crests enlarged androunded to form beads 1. One of the end ridges 8 is formed at the side40 edge of the section having its outer side wall 9 constructed of atriple thickness of material to increase the rigidity of the side wallwhich is adapted to spring over the opposite end ridge ll] of the nextadjacent section, establishing an 45 interlocking joint between thesections of roofing. The end ridge [0 is disposed inwardly from the sideedge of the section leaving a nailing strip provided with openings IIfor nailing the section in place, which openings are covered by theadjoining section when the sections are joined together. In order toinsure a tight gripping of the interlocking ridges of the sections, aspring clamping member l2 of semi-circular shape in cross section isengaged over the bead of the ridge 8 forming the joint, thus holding theridges 8 and I0 tightly together.

In practice, the sections of roofing are laid by first nailing onesection in place along its nailing edge. The next section is then placedso that the end ridge 8 engages over the end ridge [0 of the section inplace, after which the spring clamp I2 is engaged over the interlockingridges of the sections locking them together. It will be seen that thesections as laid overlap the nailing edge of the sections preventing anydanger of water seeping through the nail holes. The joint establishes atight Weatherproof connection between the sections without the need ofusing special tools, thus facilitating the laying of the roof.

It is to be understood that the form of my invention herein shown anddescribed is to be taken as a preferred example of the same and thatcertain changes in the shape, size and arrangement of the parts may bemade without departing from the spirit of the invention or the scope ofthe subjoined claim.

Having thus described my invention, I claim:

A joint for sections of sheet metal roofing comprising sections havingspaced U-shaped ridges bent therefrom having enlarged crests, the wallof the ridges below the crests being disposed in spaced parallelrelation, one ridge being formed at one side edge of each section withits outer wall free to resiliently engage over the crest of the oppositeend ridge of the next adjacent section, the free wall of the engagingridge having its lower edge reversely bent to form a multiple thicknessof material on the inner side of the free wall adapted to engage beneaththe crest of the engaged ridge.

EDWARD M. DELK.

